<!-- wp:button {"style":{"border":{"radius":0},"color":{"text":"#1b9b6c","background":"#aa5a20"}}} -->
<div class="wp-block-button"><a class="wp-block-button__link no-border-radius has-text-color has-background" style="background-color:#aa5a20;color:#1b9b6c">My button</a></div>
<!-- /wp:button -->
